"When I was three years old, I was picked up by my master and learned mathematics since I was a child, and I am quite proficient.

Thirty years ago, I came into contact with the prophecy of the Six Immortals by chance, and I was particularly interested, so I kept researching and found that the prophecies of the Six Immortals were broad and profound, and I understood that I was just a frog at the bottom of the well, so I said goodbye to my master and traveled everywhere.

Returning after thirty years, he knows everything in the world, so he was sent here to assist Senior Brother Zhao, maybe there is only providence in the dark, but I met you......" Ouyang Mu stared at Zhang Yu with bright eyes.

"Oh, meet me?"

"I didn't pay attention at the time, you know, a few days ago I calculated the hexagram, it was a great omen, everyone in the Black Iron Castle could not escape, but two days later, this hexagram suddenly changed, and it became a glimmer of chance, which surprised me very much, you must know that I am good at calculations for decades, and it is the first time I have encountered this kind of thing, do you know why?"

Zhang Yu tasted the tea leaves silently and shook his head.

"I have calculated your hexagram and found that your hexagram is not only blank in the past, but also in the hazy chaos of the future, in other words, everything is possible.

At first, I didn't know how to explain it, but when I happened to think of the prophecy of the Six Dao Immortals, I assumed one thing, if you are the Heavenly Master in the prophecy, then everything can be explained......" Ouyang Mu's eyes flashed with wisdom.

"But why do you think that I am the Heavenly Master, and haven't all the Heavenly Master clan been wiped out?" Zhang Yu couldn't help but ask.

"Of course I have evidence, my eyes are different from ordinary people since I was a child, I have real eyes, and I can see some things that ordinary people can't see, such as ghosts ......"

"A lot of pupils and spells can see ghosts, what's so strange about that?" Zhang Yu asked curiously.

"Having said that, but I can see that there are two ghosts living on you......" Ouyang Mu continued, Zhang Yu took a breath when he heard this, Xiao Hei and Lin Xueyue both lived in Jade Perry.

"Don't be nervous, I thought at that time, the one who can bring ghosts in this world is either a heavenly master or a ghost domain person, and I pinched my fingers and found that you are the turning point of this crisis, so I boldly guessed that you are a heavenly master......"

Zhang Yu was slightly shocked, this Ouyang Mu's insight ability was too strong, and he actually analyzed from these details that he was a Heavenly Master.

"The Celestial Master Clan did disappear without a trace in the last war, and I also specifically checked some information and found some secrets of the Celestial Master Clan, if we have a chance to go back alive this time, I will hand over these materials to you. Ouyang Mu said with a smile.

Zhang Yu's mood was extremely complicated, according to Ouyang Mu, the Heavenly Master clan still exists?

"It doesn't matter if you don't admit it, let's not discuss this, let's have tea!" Seeing Zhang Yu bowing his head and pondering, Ouyang Mu said with a smile.

The two of them sat in the room with their teacups in their hands, and time flowed quietly.

The sky above the Black Iron Castle was covered with battle clouds, and the atmosphere was tense to the extreme, and the war beasts seemed to wake up, revealing their hideous minions.

The castle towers and the fiery crossbows on the city walls were all pushed out, aiming at them hundreds of meters away, and all the formations of the Black Castle were finally checked and charged. All the disciples were assigned to their personal posts, and the supplies were dragged out and placed under the city walls.

Some of the outer disciples had come here for the first time and had not yet experienced this kind of war scene, and they were particularly nervous.

For example, Zhou Fat'er and Wang Chensheng are one of them, Zhou Fat'er was arranged to rescue and treat the wounded, while Wang Chensheng carried supplies, and the two were too weak in cultivation and were arranged to logistics.

Of course, there were no wounded who could be rescued, and Zhou Fat'er also made a cameo appearance as a porter, and after the two of them carried hundreds of kilograms of crossbow arrow boxes to the tower, they hid next to it and stole for a while.

"The boss is in prison, I don't know if there's anything wrong?" asked Zhou Fat'er with a frown.

"Don't worry, he's fine. Wang Chensheng comforted. Before the two of them finished speaking, they saw a familiar figure, and the two were overjoyed and hurriedly greeted them.

"Boss, are you alright?" the two of them asked.

"It's okay, you come with me, I have something to say to you. Zhang Yu said that the strength of the two is too weak, and there may be a big war next, and they will hang up if they are not careful, so Zhang Yu must arrange a back road for the two.

"Okay!" Zhou Fat'er and Wang Chensheng glanced at each other and nodded, just as their task was completed, the three of them returned to the dormitory.

After closing the door, Zhang Yu asked the two to sit down, and the atmosphere was quite depressing at this time.

Seeing Zhang Yu thinking, Zhou Fat'er didn't bother, he knew that Zhang Yu must have something to say.

"The scale of this grey wave is unprecedented, and there will be a lot of pressure on Blackcastle, and if that happens, I just say if...... You must take refuge on the second floor of the prison as quickly as possible, and report my name if you have any questions. Zhang Yu said with a serious expression.

"Is that really going to happen?" Zhou Fat'er's face turned pale, and he asked after taking a deep breath.

"I hope that kind of thing will not happen, if the fat man has weak legs, Chen Sheng, you must take him away. ”

"I know. Wang Chensheng's expression also became serious, and he nodded cautiously.

"Don't say anything about this matter, you just know, okay, I still have to leave beforehand......" Zhang Yu sighed and said.

Just as the Black Castle was preparing for war, an army of underground creatures appeared dozens of kilometers away from the Black Castle, which was full of caves and the marching speed was slow, and the Ghost Mother calculated that it would take about 24 hours to reach the Black Castle.

The creatures along the way seemed to encounter some kind of disaster, and they all ran frantically, and those who ran slowly either became food for the Gray Tide army or became a member of the Gray Tide army.

It is overwhelming, like a raging wave, destroying everything in its path.

In the dark, you can see countless green eyes, like a sky full of stars, weird and bright.

The ghost mother didn't know where to get dozens of monitor lizards, these monitor lizards were more than ten meters tall, too small compared to demon monitor lizards, and could barely act as a façade.

The Ghost Mother stood on the head of one of the largest monitor lizards, swaying as the monitor lizard crawled, and his eyes seemed to see the Black Castle in the distance through the darkness.

"Zhang Yu, I'm here!" said the ghost mother with a sneer.

On the other side, the rescue team from Black Castle had crossed the line of heaven and quickly headed to the Lantian Transit Station, they were also unlucky, they encountered many creatures running away on the way, and on the way they encountered a cave python.

Fortunately, they were alert and hid in advance, but unfortunately they were still discovered by the cave python, and the rescue team was so frightened that their scalps were numb.

But they found that things seemed to be a little strange, as if the cave python did not see them, turned its head and swam away quickly, as if some monster was chasing after them.

Seeing the cave python disappear into the darkness, everyone breathed a sigh of relief, they didn't have time to think about why the python didn't attack them, everyone could vaguely feel that things seemed to be a little abnormal.

A day later, they came to the Lantian Transfer Station, which was still very calm, and they breathed a sigh of relief, and hurriedly sent Zhao Xiao's letter to Senior Brother Chen Chen, who was in charge.

"Senior Brother Zhao's letter?" asked Senior Brother Chen curiously.

He and Zhao Xiao were disciples who entered the inner gate in the same period, and the relationship was not bad, he opened the letter and looked at it, and couldn't help but look serious.

"Ghost Domain?" Senior Brother Chen Chen couldn't help but be taken aback when he saw the word Ghost Domain, he had read the secret letter of the sect, and the Ghost Domain had to be guarded against, but who would know that the people of the Ghost Domain had infiltrated the sect and attacked the Black Castle on a large scale.

"You guys take a rest first, I have my own arrangements for this matter!" Chen Chen said.

"Yes!" the help-seeking team then took their leave.

This matter is not trivial, if the Black Castle is lost, the Lantian transfer station is also defenseless, and if it is lost, it will be a big trouble. The news had to be reported to Elder Zhao Tianming, who crushed the jade slip.

At the same time, the virtual image of Elder Zhao Tianming of the castle outside the spirit stone mine cave immediately appeared, due to the interference of the spirit stone in the spirit stone cave, the black iron castle could only use the most primitive communication method, and the Lantian transfer station was much more convenient.

"Chen Chen, is there something wrong?"

"Report to Elder Zhao, Black Castle has discovered the people of the Ghost Domain......"